Insert, Update, and Delete rows directly in DataGrid and save changes in database

I have a ListView with a list of tables from my SQL Server database. I also have a Selected event for my list view items, which populate my DataGrid with the table in the database.

I would like to have the user be able to INSERT, UPDATE, & DELETE rows in the selected table and save those changes in the database.

Here is my code that populates the DataGrid when the ListView item is selected. I removed some to not make this too long:

    public partial class TableManagement : UserControl
{
    public TableManagement()
    {
        InitializeComponent();
    }


      private void CustomerContact_Selected(object sender, RoutedEventArgs e)
    {
        try
        {
            string connectionString = ("Data Source=WINDOWS-B1AT5HC\\SQLEXPRESS;Initial Catalog=CustomerRelations;Integrated Security=True;");
            DataTable dt = new DataTable();
            SqlConnection connection = new SqlConnection(connectionString);
            SqlDataAdapter cmd = new SqlDataAdapter("SELECT [TXT_CUST_CNT], [Inactive] FROM [hb_CustCntct] ", connection);
            cmd.Fill(dt);
            dt.AcceptChanges();
            dt_TableManagement.DataContext = dt;

            dt_TableManagement.SelectedIndex = 0;

        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }

Here is my XMAL code for the listVeiw and DataGrid

            <!--Grid 1-->
        <Grid x:Name="Grid1" Grid.Row="1" Grid.Column="0" Margin="15">
            <ListView>
                <ListViewItem x:Name="CustomerContact" Content="Customer Contact" Selected="CustomerContact_Selected"/>
                <ListViewItem x:Name="CsrNames" Content="Customer Service Representative Names" Selected="CsrNames_Selected"/>
                <ListViewItem x:Name="DisputeClassification" Content="Dispute Classification" Selected="DisputeClassification_Selected"/>
                <ListViewItem x:Name="DisputeStatus" Content="Dispute Status" Selected="DisputeStatus_Selected"/>
                <ListViewItem x:Name="FinancialAdjustment" Content="Financial Adjustment" Selected="FinancialAdjustment_Selected"/>
                <ListViewItem x:Name="InitialCallAnalysis" Content="Initial Call Analysis" Selected="InitialCallAnalysis_Selected"/>
                <ListViewItem x:Name="InitialCallReason" Content="Initial Call Reason" Selected="InitialCallReason_Selected"/>
                <ListViewItem x:Name="MeterIssue" Content="Meter Issue" Selected="MeterIssue_Selected"/>
                <ListViewItem x:Name="OpenInError" Content="Open In Error" Selected="OpenInError_Selected"/>
                <ListViewItem x:Name="PrimaryCause" Content="Primary Cause" Selected="PrimaryCause_Selected"/>
                <ListViewItem x:Name="RequestedWork" Content="Requested Work" Selected="RequestedWork_Selected"/>
                <ListViewItem x:Name="RevenueClass" Content="Revenue Class" Selected="RevenueClass_Selected"/>
                <ListViewItem x:Name="ServiceOrderDetails" Content="Service Order Details" Selected="ServiceOrderDetails_Selected"/>
                <ListViewItem x:Name="ServiceOrderType" Content="Service Order Type" Selected="ServiceOrderType_Selected"/>
                <ListViewItem x:Name="ServiceOrderAdjustment" Content="Service Order Adjusted" Selected="ServiceOrderAdjustment_Selected"/>
                <ListViewItem x:Name="UnderlyingCause" Content="Underlying Cause" Selected="UnderlyingCause_Selected"/>
                <ListViewItem x:Name="UtilityReportType" Content="Utility Report Type" Selected="UtilityReportType_Selected"/>
                <ListViewItem x:Name="WFMIssuedBy" Content="WFM Issued By" Selected="WFMIssuedBy_Selected"/>
            </ListView> 
        </Grid>

        <!--Grid 2-->
        <Grid x:Name="Grid2" Grid.Row="1" Grid.Column="2" Margin="15">
            <DataGrid x:Name="dt_TableManagement"
              materialDesign:ListBoxAssist.IsToggle="True"
              Background="White"
              EnableColumnVirtualization="True"
              EnableRowVirtualization="True"
              ItemsSource="{Binding}">
            </DataGrid>
        </Grid>